I think MidKnight is right..... pretty sure they are made by First Union Tech ......what are you looking for about it?
The one sold here is a real good performer in my book..... solid... long lasting..... and PCC freindly.
You gotta get a 16" barrel on that Tommy... just don't look correct without it. That Mechtech has been
tempting me for some time.
http://www.mechtechsys.com/glock.html